How to place repeatedly a small texture on very large surface?
This should be your basic material for any Image

To increase the texture size, Simply increase the scale in the mapping node

WARNING  However with most textures, you will see noticeable tiling
To reduce the amount of tiling, i suggest looking into Blender Guru's Video here:
https://www.youtube.com/watch?v=-VgtSL5ZpYc&amp;feature=emb_title